Method of forming welding projections on nuts



Oct. 7, 1952 E. E. HOWE 2,612,647

METHOD OF FORMING WELDING PROJECTIONS ON NUTS Filed June 2, 1950 17 na'enzar 77 Far? I. flaw/e paw 4M Patented Oct. 7, 1 9 52 METHOD OF FORMING WELDING PROJECTIONS ON NUTS Earl E. Howe, Chicago, Ill.

Application June 2, 1950, Serial No. 165,777

1 Claim. (Cl. 10-86) v My invention relates to an improvement in nuts, and has for one purpose to provide a nut which can be applied to and secured in relation to another part such as a sheet.

Another purpose is to provide a nut which can be quickly and economically applied to a sheet.

Another purpose'is to provide a nut and improved means and method of securing the nut in relation to a sheet or other sup-porting member. Another purpose is to provide an improved weld nut with extruded welding projections extending beyond the plane of one end of the nut. Another purpose is to provide a nut which shall be efficient and economical.

Other purposes will appear from time to time in the course of the specification and claims.

The present application is a division of my copending application Serial No. 560,984, filed n the United States Patent Office on October 30,

I illustrate my invention more or less diagrammatically in the accompanying drawings wherein: Figure 1 is a plan view of a form of my nut;

Figure 2 is a section on the line 2-2 of Figure 1;

Figure 3 is a perspective of the nut shown in Figures 1 and 2; and

Figure 4 is a diagrammatic illustration of a vertical section through a forming die and nut.

Like parts are indicated by like symbols throughout thespeci-fication and drawings.

Referring to the drawings, I illustrate a nut having a generally square body [5, which, for example, may be formed from a rectangular blank. l9 indicates any suitable screw-threaded central aperture.

In the formation of the nut it is suitably struck by a die at its corners, the metal being left free to extend outwardly. The result is the provision of corner projections formed as at [6, if the die is opened or apertured to permit the formation of projections ll, adapted for projection welding. It will be understood that the shape of the projections may be suitably varied, but I illustrate, as shown in detail in Figure 3, corner welding projections which extend outwardly from the generally plane surface of one end of the nut body l5.

The nut is shown in Figures 1 and 2 as welded to any suitable sheet 4b, with its screw-threaded aperture 19 aligned with any suitable aperture l8 in the plate.

In the formation of my nut I may employ, for example, a circular punch which engages the corners of the body I and strikes out the ears or corner projections l6.

ner surface of the circular die which may be concentric with the center of the nut. As the metal is unconfined, it flows laterally outwardly under the die to produce the form of projection l6 shown in Figure 1. To form the projection I! it is necessary merely to place the body [5 on an otherwise generally plane surface which has apertures appropriate to permit the metal to flow downwardly or outwardly below or from the bottom or end of the body [5 which rests on the forming surface.

It will be realized that whereas I have described and shown a practical and operative device, nevertheless many changes may be made in size, shape, number and disposition of parts without departing from the spirit of the inven tion. I therefore wish my description and drawings to be taken as in a broad sense illustrative anddiagrammatic, rather than as limiting me precisely to the precise showing.

The use and operation of my invention are as follows In the application of my invention, I may start with the conventional square nut, or with a slu of metal, or with a section of wire, as the specific form of the nut may be widely varied.

While I do not wish to be limited to any specific shape of nut or any specific detail of forming or ofisetting, a convenient arrangement is to employ a generally rectangular nut blank and to offset or outwardly spread its corners, as shown in Figure 1, by subjecting it to any suitable forming die. A practical forming die may have an internally arcuate or circular surface, as adapted to strike the corners, as indicated at 16a. in Figure 1.

I claim:

The method of punch forming a weld nut by a single application of pressure, which includes providing a generally rectangular nut body having defined corners, a central aperture, and parallel plane end faces, supporting said nut body, except at localized areas under said corners, on a laterally unrestricted supporting surface, directing localized pressure solely against the corners of the nutbody in a direction parallel with the axis of the nut and against the unsupported areas of the corners of the nut body, while permitting longitudinal flow of part of the metal at such unsupported areas and simultaneously permitting unrestricted lateral flow of the metal displaced by the pressure against the nut corners, and thereby, by a single application of pressure, forming laterally extended ears and welding prol6a indicates the in- I 4 'jections unitary therewith, with the welding UNITED STATES PATENTS projections extending beyond the plane of the end Number Name Date nut 2,054,187 Almdale Sept. 15, 1936 EARLE HOWE 2,105,139 Demoboski Jan. 11, 1938 5 2,281,699 Langmaid et a1. May 5, 1942 f 2,310,316 Renner Feb. 9, 1943 REFERENCES CITED 2,314,075 Cousino Mar. 16, 1943 7 2 335 593 .VHowe Nov. 30 1943 The followmg-references are of record mthe P r I m of this. t t: I I 4 10 ,336,791 I La, Barre D80. 14I 1943 "2,385,991 Huntoon Oct. 2, 1945 

